CN110094831A - Multi-gang air-conditioner and its defrosting control method - Google Patents
Multi-gang air-conditioner and its defrosting control method Download PDFInfo
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- CN110094831A CN110094831A CN201910283741.8A CN201910283741A CN110094831A CN 110094831 A CN110094831 A CN 110094831A CN 201910283741 A CN201910283741 A CN 201910283741A CN 110094831 A CN110094831 A CN 110094831A
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- 238000010257 thawing Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 239000003507 refrigerant Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to air conditioner technical fields, and in particular to a kind of multi-gang air-conditioner and its defrosting control method.In order to improve Defrost mode in the case where not increasing cost, multi-gang air-conditioner defrosting control method proposed by the present invention includes the following steps: in the case where multi-gang air-conditioner meets defrosting condition, detects outdoor environment temperature；Judged whether to execute the outdoor unit of the multi-gang air-conditioner asynchronous defrosting operation according to the outdoor environment temperature；In the case where executing asynchronous defrosting operation to the outdoor unit, the outer machine expansion valve of outdoor unit and the interior machine expansion valve and interior machine fan of outer machine fan and indoor unit are selectively controlled, is operated with executing asynchronous defrosting to the outdoor unit.The present invention does not need switching four-way valve (being switched to refrigeration mode) when defrosting, ensure that the continuity of indoor heating, improve indoor comfort when defrosting, while avoiding because of cold wind sense when switching refrigeration mode is defrosted.
Description
Technical field
The invention belongs to air conditioner technical fields, and in particular to a kind of multi-gang air-conditioner and its defrosting control method.
Background technique
In the same system of VRF air conditioning air-conditioning installation, greater number of interior machine is typically contained and far fewer than interior machine
The outer machine (1 or more) of quantity, when more outer machine parallel connections, outer machine as a whole, when defrosting when, the outer same stepping of machine
Row, indoor unit stops blowing at this time, and absorbs heat from indoor, and room temperature decreases, although time accounting entirely heats week
Phase is shorter, but will affect comfort.Various improvement were carried out for defrosting in spite of part brand producer, for example unit increase is suitable
To defrosting, while allowing high temperature refrigerant to pass through indoor unit, the refrigerant for bypassing a part of high pressure-temperature enters outdoor heat exchanger, with
Indoor discomfort when delaying four-way valve commutation to enter the interval time inversely defrosted greatly, but still defrosting can not be exempted；Also have
Two heat exchangers are arranged in part brand producer in outer machine on the same stage, carry out subregion defrosting, i.e. half (a part) room when defrosting
External heat exchanger is heated, half (a part) outdoor heat exchanger freezes, etc. half heat exchanger defrosting finish, then exchange
The effect of two heat exchangers, but circuit design is complex, higher cost.
Therefore, the invention proposes a kind of new multi-gang air-conditioners and its defrosting control method, in the feelings for not increasing cost
Improve Defrost mode under condition.
Summary of the invention
In order to solve the above problem in the prior art, in order to improve Defrost mode in the case where not increasing cost,
The invention proposes a kind of multi-gang air-conditioner defrosting control method, the multi-gang air-conditioner includes more indoor units and at least two
Outdoor unit, every indoor unit include indoor heat exchanger and with the matched interior machine expansion valve of the indoor heat exchanger and interior machine wind
Fan, every outdoor unit include outdoor heat exchanger and with the matched outer machine expansion valve of the outdoor heat exchanger and outer machine fan；Institute
It states multi-gang air-conditioner defrosting control method and includes the following steps: S110, in the case where multi-gang air-conditioner meets defrosting condition, examine
Survey outdoor environment temperature；S120, judge whether to execute the outdoor unit of the multi-gang air-conditioner according to the outdoor environment temperature
Asynchronous defrosting operation；S130, to the outdoor unit execute asynchronous defrosting operation in the case where, selectively control described in
The outer machine expansion valve and outer machine fan of outdoor unit and the interior machine expansion valve and interior machine fan of the indoor unit, to the outdoor
Machine executes asynchronous defrosting operation.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, step S130 is specifically included: described
It in the case that outdoor unit is all turned on, first defrosts to one of outdoor unit, and will be outside the outdoor unit be defrosted
Machine expansion valve standard-sized sheet simultaneously closes off the outer machine fan of the outdoor unit to be defrosted；Whether detection indoor unit is all turned on；If room
Interior machine is all turned on, then selectively closes off the interior machine fan of part indoor unit.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, " if indoor unit is all turned on, select
Selecting property close portion divide the interior machine fan of indoor unit " the step of specifically include: obtain the heating efficiency of every indoor unit；It will be described
Indoor unit is ranked up from high to low according to heating efficiency；The interior machine wind of part indoor unit is selectively closed off as follows
Fan: S31, according to sequence first close preceding 50% interior machine fan；After S32, preset time, if also not up to exiting defrosting
Condition, then the interior machine fan of 50% indoor unit, opens simultaneously the interior machine fan of preceding 50% indoor unit after closing；S33, it presets
After time, if also not up to exiting the condition of defrosting, the interior machine fan of preceding 50% indoor unit is closed, after opening simultaneously
The interior machine fan of 50% indoor unit；S34, step S32 and S33 are repeated, exits defrosting condition until reaching.It is exited if reached
The condition of defrosting then opens pent interior machine fan.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, the preset time is 9-11 minute
Between any time；And/or the preset time is 10 minutes.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, step S130 further include: if indoor
Machine is not all turned on, then the interior machine expansion valve for the indoor unit that do not open is fully open.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, step S130 is specifically included: described
In the case that outdoor unit is not all turned on and the indoor unit part is opened, first one of outdoor unit opened is removed
Frost, and by the outer machine expansion valve standard-sized sheet of the outdoor unit to be defrosted, simultaneously close off the outer machine fan of the outdoor unit to be defrosted；
Make at least one outdoor unit that do not open starting heating mode；Open the interior machine expansion valve of at least one indoor unit that do not open.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, step S130 further include: reduction has been opened
The aperture of the interior machine expansion valve for the indoor unit that the revolving speed of the interior machine fan of the indoor unit opened and reduction have turned on.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, step S130 further include: in completion pair
After the defrosting operation of outdoor unit, defrosting control is exited, runs multi-gang air-conditioner according to preset program.
In the preferred embodiment of above-mentioned multi-gang air-conditioner defrosting control method, in the step s 120, if outdoor ring
Border temperature is more than or equal to preset temperature, then executes asynchronous defrosting to the outdoor unit of the multi-gang air-conditioner and operate；Wherein, described
Preset temperature is that the arbitrary temp or the preset temperature between 6-8 DEG C are 7 DEG C.
The present invention also provides a kind of multi-gang air-conditioner, including controller, the controller is configured to execute above-mentioned
Multi-gang air-conditioner defrosting control method.
In multi-gang air-conditioner device defrosting control method of the invention, the outer machine by selectively controlling outdoor unit expands
The interior machine expansion valve and interior machine fan of valve and outer machine fan and indoor unit are operated with executing asynchronous defrosting to outdoor unit.This
Sample one does not need to ensure that the continuity of indoor heating by switching four-way valve (being switched to refrigeration mode), improve and remove
Indoor comfort when white, while avoiding because of cold wind sense when switching refrigeration mode is defrosted.
Detailed description of the invention
Fig. 1 is the broad flow diagram of multi-gang air-conditioner defrosting control method of the invention；
Fig. 2 is the structural schematic diagram of the multi-gang air-conditioner of an embodiment of the present invention.
Specific embodiment
To keep the embodiment of the present invention, technical solution and advantage more obvious, below in conjunction with attached drawing to skill of the invention
Art scheme is clearly and completely described, it is clear that and the embodiment described is a part of the embodiments of the present invention, rather than all
Embodiment.It will be apparent to a skilled person that these embodiments are used only for explaining technical principle of the invention, and
It is not intended to be limiting protection scope of the present invention.
Multi-gang air-conditioner of the invention includes more indoor units and at least two outdoor units, every indoor unit are changed including interior
Hot device and with the matched interior machine expansion valve of indoor heat exchanger and interior machine fan, every outdoor unit include outdoor heat exchanger and with
The matched outer machine expansion valve of outdoor heat exchanger and outer machine fan.Referring to Fig.1, Fig. 1 is multi-gang air-conditioner defrosting control of the invention
The broad flow diagram of method.As shown in Figure 1, multi-gang air-conditioner defrosting control method of the invention include the following steps: S110,
In the case that multi-gang air-conditioner meets defrosting condition, outdoor environment temperature is detected；S120, judged whether according to outdoor environment temperature
Asynchronous defrosting operation is executed to the outdoor unit of multi-gang air-conditioner；S130, the feelings that asynchronous defrosting operates are being executed to outdoor unit
Under condition, the outer machine expansion valve of outdoor unit and the interior machine expansion valve and interior machine wind of outer machine fan and indoor unit are selectively controlled
Fan is operated with executing asynchronous defrosting to outdoor unit.
In order to clearly demonstrate the defrosting control method of multi-gang air-conditioner of the invention, below with two outdoor units and four
It is described in detail for the multi-gang air-conditioner of indoor unit.
Referring to Fig. 2, Fig. 2 is the structural schematic diagram of the multi-gang air-conditioner of an embodiment of the present invention.As shown in Fig. 2, multi-joint
Air conditioner include two outdoor unit (outdoor unit A and outdoor unit B) He Sitai indoor units (indoor unit C, indoor unit D, indoor unit E and
Indoor unit F).Wherein, outdoor unit A includes outdoor heat exchanger A0 and matches the outer machine expansion valve A1 of setting with outdoor heat exchanger A0
With outer machine fan A2；Outdoor unit B includes outdoor heat exchanger B 0 and matches the outer machine expansion valve B1 of setting with outdoor heat exchanger B 0
With outer machine fan B2；Every indoor unit, which all matches, is provided with machine expansion valve (interior machine expansion valve C1, interior machine in Fig. 1 in corresponding
Expansion valve D1, interior machine expansion valve E1, interior machine expansion valve F1) and interior machine fan (interior machine fan is not shown in Fig. 1).
By taking the structure of multi-gang air-conditioner shown in Figure 2 as an example, in step S110, the defrosting condition of multi-gang air-conditioner can be with
It is flexibly set by those skilled in the art, such as can be according to temperature, electric current, air humidity etc. is judged, herein no longer in detail
It describes in detail bright.In the step s 120, as an example, when outdoor environment temperature is more than or equal to 7 DEG C, to the outdoor unit of multi-gang air-conditioner
Execute asynchronous defrosting operation.It will be appreciated by persons skilled in the art that if outdoor environment temperature is too low, to outdoor unit
Executing the time used when asynchronous defrosting can be long, can be in outdoor environment temperature in order to shorten the time of asynchronous defrosting
Degree executes asynchronous defrosting operation again when being more than or equal to 7 DEG C.The settable other preset temperatures of those skilled in the art, such as 6-
Arbitrary temp etc. between 8 DEG C.
In step s 130, it is divided into following different scene when executing asynchronous defrosting operation to outdoor unit.
Scene 1, in the case where outdoor unit is all turned on: referring to Fig. 2, first being removed at this time to one of outdoor unit
Frost, it is assumed that first defrost to outdoor unit A, then by the outer machine expansion valve A1 standard-sized sheet of outdoor unit A, simultaneously close off the outer of outdoor unit A
Machine fan A2, outdoor unit B operate normally heating mode.Then whether detection indoor unit is all turned on, and machine is all turned on indoors
In the case where, obtain the heating efficiency of every indoor unit；Then indoor unit is ranked up from high to low according to heating efficiency.It is false
If the heating efficiency of indoor unit is followed successively by indoor unit C, indoor unit D, indoor unit E, indoor unit F from high to low, then first close indoor
The interior machine fan of machine C and indoor unit E.So, since the interior machine fan of indoor unit C and indoor unit E is closed, and interior machine expands
Valve C and interior machine expansion valve B are not closed, therefore will not be exchanged heat with air by the refrigerant of indoor unit C and indoor unit D, still
Higher temperature is kept, then high temperature refrigerant flows into outdoor heat exchanger A0 to defrost to outdoor unit A.
Further, time of the interior machine fan of indoor unit C and indoor unit E is closed beyond after preset time, if do not reached also
To the condition for exiting defrosting, then the interior machine fan of indoor unit E and indoor unit F is closed, opens simultaneously indoor unit C's and indoor unit D
Interior machine fan, if also not up to exiting the condition of defrosting, closes indoor unit C and indoor unit D after preset time
Interior machine fan, open simultaneously the interior machine fan of indoor unit E and indoor unit F.That is, making a part of indoor unit and another portion
Divide indoor unit alternately to stop heating, if reach the condition for exiting defrosting, pent interior machine fan is opened, is made more
The normal heating mode of in-line recovery.
Above-mentioned preset time can be set according to actual needs by those skilled in the art, such as preset time is set
Any time being set between 9-11 minutes, or set preset time to 10 minutes.By alternately stopping indoor unit
It only heats farthest to reduce the influence to defrost to room temperature.
As an example, in the scene 1, if indoor unit is not all turned on, the indoor unit that will can not open
Interior machine expansion valve it is fully open.If being removed for example, the indoor unit C in Fig. 2 is in non-open state to outdoor unit A
When white, the interior machine expansion valve of indoor unit C can be directly opened, it is not necessary to turn off the indoor unit having turned on, farthest reduce
Influence to indoor environment temperature.
As described above, operate when completing to the defrosting of outdoor unit A and then defrost to outdoor unit B, Defrost mode with
It is identical to the defrosting operation of outdoor unit A.
Scene 2: in the case where outdoor unit is not all turned on and indoor unit part is opened: reference Fig. 2, if outdoor unit A
In non-open state, outdoor unit B is in the open state, and indoor unit C and indoor unit D are in non-open state, indoor unit E and room
Interior machine F is in the open state.At this point, when needing to defrost to outdoor unit B (it will be appreciated by persons skilled in the art that
Since outdoor unit A is starting, do not need to defrost to outdoor unit A), by the outer machine expansion valve B1 standard-sized sheet of outdoor unit B, together
When close outdoor unit B outer machine fan B2, then make outdoor unit A start heating mode, open simultaneously indoor unit C and/or interior
The interior machine expansion valve C1 of machine D and/or interior machine expansion valve D1 (the interior machine fan of indoor unit C and indoor unit D are not opened).Assuming that opening
The interior machine expansion valve C1 of indoor unit C, indoor unit C constitutes the bypass of refrigerant at this time, i.e., will not be with by the refrigerant of indoor unit C
Air exchanges heat, and still maintains higher temperature, and then high temperature refrigerant flows into outdoor heat exchanger B 0 to remove to outdoor unit B
Frost.And since outdoor unit A starts heating mode to replace outdoor unit B, it can guarantee the normal heating of indoor unit.
Preferably, in scene 2, when opening the interior machine expansion valve for the indoor unit that do not open, it can also reduce to have turned on
The aperture of the interior machine expansion valve for the indoor unit that the revolving speed of the interior machine fan of indoor unit and reduction have turned on.Machine expansion valve in reducing
It can guarantee weak heating (rather than refrigeration heat absorption), improve indoor comfort degree.After completing the defrosting operation to outdoor unit B,
Defrosting control is exited, runs multi-gang air-conditioner according to preset program.
It should be noted that being usually to illustrate that indoor unit is in part if outdoor unit is not all turned in scene 2
The state of load, i.e. indoor unit are also at the state not being all turned on, therefore, the situation not being all turned on are in outdoor unit
Under, when defrosting to the outdoor unit having turned on, the interior machine expansion valve for the indoor unit that do not open is opened, being equivalent to will not
Bypass circulation of the indoor unit of unlatching as refrigerant.
The invention also provides a kind of multi-gang air-conditioner, including controller, controller is configured to execute above-mentioned more
Gang air-conditioner defrosting control method.Explanation is seen above about multi-gang air-conditioner defrosting control method, details are not described herein.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of multi-gang air-conditioner defrosting control method, the multi-gang air-conditioner includes more indoor units and at least two outdoors
Machine, every indoor unit include indoor heat exchanger and with the matched interior machine expansion valve of the indoor heat exchanger and interior machine fan, often
Platform outdoor unit include outdoor heat exchanger and with the matched outer machine expansion valve of the outdoor heat exchanger and outer machine fan；
It is characterized in that, the multi-gang air-conditioner defrosting control method includes the following steps:
S110, in the case where multi-gang air-conditioner meets defrosting condition, detect outdoor environment temperature；
S120, judged whether to execute the outdoor unit of the multi-gang air-conditioner asynchronous defrosting behaviour according to the outdoor environment temperature
Make；
S130, to the outdoor unit execute asynchronous defrosting operation in the case where, selectively control the outdoor unit outside
The interior machine expansion valve and interior machine fan of machine expansion valve and outer machine fan and the indoor unit, to execute difference to the outdoor unit
Step defrosting operation.
2. multi-gang air-conditioner defrosting control method according to claim 1, which is characterized in that step S130 is specifically included:
It in the case where the outdoor unit is all turned on, first defrosts to one of outdoor unit, and will be described to be defrosted
The outer machine expansion valve standard-sized sheet of outdoor unit simultaneously closes off the outer machine fan of the outdoor unit to be defrosted；
Whether detection indoor unit is all turned on；
If indoor unit is all turned on, the interior machine fan of part indoor unit is selectively closed off.
3. multi-gang air-conditioner defrosting control method according to claim 2, which is characterized in that " if indoor unit is all opened
Open, then selectively close off the interior machine fan of part indoor unit " the step of specifically include:
Obtain the heating efficiency of every indoor unit；
The indoor unit is ranked up from high to low according to heating efficiency；
The interior machine fan of part indoor unit is selectively closed off as follows:
S31, the interior machine fan that preceding 50% is first closed according to sequence；
After S32, preset time, if also not up to exiting the condition of defrosting, the interior machine wind of 50% indoor unit after closing
Fan, opens simultaneously the interior machine fan of preceding 50% indoor unit；
After S33, preset time, if also not up to exiting the condition of defrosting, the interior machine wind of preceding 50% indoor unit is closed
Fan, opens simultaneously the interior machine fan of rear 50% indoor unit；
S34, step S32 and S33 are repeated, exits defrosting condition until reaching.
If reaching the condition for exiting defrosting, pent interior machine fan is opened.
4. multi-gang air-conditioner defrosting control method according to claim 3, which is characterized in that the preset time is 9-11
Any time between minute；And/or
The preset time is 10 minutes.
5. multi-gang air-conditioner defrosting control method according to claim 2, which is characterized in that step S130 further include:
It is if indoor unit is not all turned on, the interior machine expansion valve for the indoor unit that do not open is fully open.
6. multi-gang air-conditioner defrosting control method according to claim 1, which is characterized in that step S130 is specifically included:
In the case where the outdoor unit is not all turned on and the indoor unit part is opened, first to one of outdoor opened
Machine defrosts, and by the outer machine expansion valve standard-sized sheet of the outdoor unit to be defrosted, and simultaneously closes off the outdoor unit to be defrosted
Outer machine fan；
Make at least one outdoor unit that do not open starting heating mode；
Open the interior machine expansion valve of at least one indoor unit that do not open.
7. multi-gang air-conditioner defrosting control method according to claim 6, which is characterized in that step S130 further include:
The interior machine expansion valve for the indoor unit that the revolving speed and reduction for reducing the interior machine fan for the indoor unit having turned on have turned on is opened
Degree.
8. multi-gang air-conditioner defrosting control method according to claim 7, which is characterized in that step S130 further include:
After completing the defrosting operation to outdoor unit, defrosting control is exited, runs multi-gang air-conditioner according to preset program.
9. multi-gang air-conditioner defrosting control method according to any one of claim 1 to 8, which is characterized in that in step
In S120, if outdoor environment temperature is more than or equal to preset temperature, the outdoor unit of the multi-gang air-conditioner is executed asynchronous
Defrosting operation；
Wherein, it is 7 DEG C that the preset temperature, which is arbitrary temp or the preset temperature between 6-8 DEG C,.
10. a kind of multi-gang air-conditioner, including controller, which is characterized in that the controller is configured to perform claim and requires 1
To multi-gang air-conditioner defrosting control method described in any one of 9.
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| CN201910283741.8A CN110094831B (en) | 2019-04-10 | 2019-04-10 | Multi-split air conditioner and defrosting control method thereof |
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| CN201910283741.8A CN110094831B (en) | 2019-04-10 | 2019-04-10 | Multi-split air conditioner and defrosting control method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503723A (en) * | 2020-02-14 | 2020-08-07 | 青岛海信日立空调***有限公司 | Air conditioning equipment |
| CN112539521A (en) * | 2020-12-21 | 2021-03-23 | 珠海格力电器股份有限公司 | Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof |
| CN114322206A (en) * | 2020-09-29 | 2022-04-12 | 美的集团武汉制冷设备有限公司 | Multi-split air conditioner and defrosting method, control device and storage medium thereof |
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| CN114484744A (en) * | 2022-02-18 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting method and multi-connected air conditioning system |
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| CN111503723A (en) * | 2020-02-14 | 2020-08-07 | 青岛海信日立空调***有限公司 | Air conditioning equipment |
| CN111503723B (en) * | 2020-02-14 | 2021-10-08 | 青岛海信日立空调***有限公司 | Air conditioning equipment |
| CN114322206A (en) * | 2020-09-29 | 2022-04-12 | 美的集团武汉制冷设备有限公司 | Multi-split air conditioner and defrosting method, control device and storage medium thereof |
| CN114322206B (en) * | 2020-09-29 | 2023-05-30 | 美的集团武汉制冷设备有限公司 | Multi-split air conditioner, defrosting method thereof, control device and storage medium |
| WO2022127309A1 (en) * | 2020-12-17 | 2022-06-23 | 珠海格力电器股份有限公司 | Defrosting control method and device, and vrf air conditioner |
| CN112539521A (en) * | 2020-12-21 | 2021-03-23 | 珠海格力电器股份有限公司 | Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof |
| CN114413416A (en) * | 2022-01-26 | 2022-04-29 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner defrosting control method, storage medium and multi-split air conditioner |
| CN114484744A (en) * | 2022-02-18 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting method and multi-connected air conditioning system |
| CN115200176A (en) * | 2022-05-24 | 2022-10-18 | 宁波奥克斯电气股份有限公司 | Control method and control device for defrosting of multiple outdoor units in parallel and multi-connected air conditioner |
| CN115200176B (en) * | 2022-05-24 | 2023-09-08 | 宁波奥克斯电气股份有限公司 | Control method and control device for defrosting of multiple external units in parallel connection and multi-connected air conditioner |
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